List of Costa-Rica Birds. 315 



I think, sufficiently distinct. It is also found in Veragua and 

 Panama. M. assimilis and M. oleaginms must refer to one 

 species ; whether M. assimilis, Scl., can ultimately be retained 

 as distinct from the southern bird is, I think, doubtful. 



Our specimens of Tyi-anniscus from Costa Rica, including one 

 from the Smithsonian Institution marked T.vilissimus, are con- 

 siderably smaller than Guatemalan specimens, and, if anything, 

 even smaller than those from Panama. Unless both races occur 

 in Costa Kica the bird should, I think, be called Tyranniscus 

 parvus, Lawr. 



Rhynchocyclus griseimentalis, described from Costa Rica, I can- 

 not distinguish from the Guatemalan bird. We have one Costa- 

 Rican specimen, and several from Veragua, all of which agree 

 with one another and with our series from Guatemala. Mr. 

 Lawrence must not depend too much upon the locality assigned 

 to his Mexican specimen. "Mexique" has a wide signification 

 sometimes ! 



Mitrephorus phaocercus and M. aurantiiventris refer to one 

 species, M. aurantiiventris, Lawr. The specimens sent by Arce 

 were not in good condition ; and although I recognized certain 

 differences between them and Guatemalan examples of M. phm- 

 ocercus, I did not feel justified in describing the Costa- Rican 

 bird. 



Myiarchus panamensis, must be erased from the list for the 

 present. 



COTINGID^. 



Tityra albitorques should be T.fraseri, Kp. (see Scl. & Salv. 

 P. Z. S. 1867, p. 757). 



BUCCONID^. 



I feel sui'e there have been too many species of Malacoptila 

 separated. The differences noticeable will, I believe, be found 

 in many cases to be sexual and not specific. 



Monasa peruana is M. grandior, Scl. & Salv. (P. Z. S. 1868, 

 p. 327). 



Trogonid^ 



Mr. Lawrence has sent his types of Trogon concinnus to Mr. 

 Gould for examination ; and it is his opinion, and I agree with 



